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) To direct and supervise work during the period power block is in force; c) Confirmation regarding cancellation of power block by each individual party and cancellation of power block. 9. Other Communication facilities: An independent inter-communication circuit is also provided between the various Section Controllers and the Chief Controller for local communication between themselves. Facilities are also provided for the Chief Controller to talk to any station on train control, deputy control, stock control and traction loco control circuits. Similarly, facilities are provided to TPC to talk to any station on the train control and traction loco control in an emergency. However, it will not be possible for Chief Controller or TPC to ring independently any station on station on any control circuit as this ringing facility is only provided to the respective Controllers. View of Traction Substation -------------------- 9
2.0 Supply System 2. POWER SUPPLY FOR TRACTION The single phase 50 Hz power for the electric traction is obtained from 220/132/110/66 kV Extra High Voltage 3 phase grid system through step down single phase transformers. For this purpose duplicate feeders comprising of only 2 phases are run from the nearest sub-station of the Supply Authority to the traction substation. The brief description of the system is given in Chapter 2 of Volume I. The 25 kV single phase conventional system as adopted on Indian Railways has been described in that chapter. A schematic diagram of the traction sub-station and feeding post indicating the general feeding arrangement in indicated at Fig 1.01. 2.1 Liaison with Power Supply Authorities For ensuring continuity and reliability of power supply for traction it is important that effective liaison is maintained between the officials of Railway and Supply Authorities. Broadly action on the following lines be taken a) A system of periodic meetings at different levels at mutually agreed intervals needs to be evolved. b) Reliability of supply involves also the maintenance of traction voltage between 25 kV and 27.5kV at the feeding posts and frequency between 48.5 Hz and 51.5Hz. the serious repercussions on Railway traffic if the above limits are not adhered to should be constantly impressed upon the Supply Authorities. c) The traction load should be treated as essential load and should not be disconnected or reduced to meet supply system exigencies. This principle has been accepted by most Supply Authorities and where this has not been done, constant efforts should be made at the high level periodic meetings to get this principle accepted. d) Since the cumulative effect of frequency power supply interruptions, even though of short duration at a time, can be very serious to Railway working. A periodical review of ‘such interruptions should be made at the Divisional level and the cause of each interruption ascertained as far as possible. The results as possible. The results of the review should be furnished to CEE to keep him fully informed of power supply position. This subject should also form an important item for discussion at the periodic meetings with the Supply Authorities. e) Power Supply for electric traction should be governed by a specific Agreement entered into by the Railway with the concerned Supply Authority before the supply is actually taken. Where this has not been done already, urgent action should be taken to have it finalized without delay. 10
Page 2: PREFACE The book on "Power Supply I
Page 5 and 6: However transformers of capacity 13
Page 7 and 8: 3. To keep the unbalance on the 3 p
Page 9 and 10: 1.2 POWER SUPPLY FOR SIGNALLING 1.2
Page 11: locomotives and Electric Multiple U
Page 15 and 16: figures. This charge should be real
Page 17 and 18: 2.4 Scrutiny of Bills have a bearin
Page 19 and 20: c) Procedure to be followed in case
Page 21 and 22: In the territorial setup one Subord
Page 23 and 24: 3.2.3 Over load Capacity of Tractio
Page 25 and 26: B. Insulation resistance will conti
Page 27 and 28: 3.3. GUIDING NOTES ON MAINTENANCE 3
Page 29 and 30: f) Fully push home the wedges betwe
Page 31 and 32: eakers/interrupters should also be
Page 33 and 34: A detail history of every battery s
Page 35 and 36: light or bluish grey according to a
Page 37 and 38: (e) Overhaul, bench tests and calib
Page 39 and 40: 3.5. FORTNIGHTLY MAINTENANCE 3.5.1.
Page 41 and 42: obstruction and also if the shock a
Page 43 and 44: 2. Test a sample of oil for BDV. 3.
Page 45 and 46: 3. Check if the terminations of the
Page 47 and 48: Fortnightly Schedule: a) Drain wate
Page 49 and 50: d) Measure the IR between auxiliary
Page 51 and 52: TRACTION DISTRIBUTION SCHEDULE OF M
Page 53 and 54: 3.0 Inspection of Traction Sub-stat
Page 55 and 56: 4.0 Switching Stations a) Switch Ya
Page 57 and 58: SI. No . APPLICATION AND INTERPRETA
Page 59 and 60: 2.2 Oxidation Carbondioxide is the
Page 61 and 62: 3.4 Pattern of generation of gases
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TABLE - I SOLUBILITY OF DIFFERENT G
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TABLE V ROGER'S METHOD OF DIAGNOSIS
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1.1 Schedules MAINTENANCE OF SF6 CI
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Point / Location Tripping Mechanism
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1.0 General Annexure 3.05 MAINTENAC
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1.5 Detailed Check Checking shall b
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DESIGN ASPECTS OF TRACTION SUBSTATI
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• Characteristics of the locomoti
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considerations enlisted in para 4.0
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xii) Load losses 135.0 kW xiii) Cur
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item Nominal System Voltage 66kV 11
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20 1250 1600 2000 245 31.5 1250 160
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i) Three post, centre post rotating
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etween live parts and different pot
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4.11.5 Design of grounding system 4
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4.12.2 BIL of various equipments us
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(d) High speed inter tripping relay
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The relay continuously monitors the
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SULFUR HEXAFLUORIDE(SF6) GAS 96 ANN
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5.0 POWER SUPPLY SYSTEM PROTECTION
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any one of the two sub-staion throu
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fault relay (132KV&25KV side) 4. ID
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will be supplied to the successful
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detected by normal distance protect
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110
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Just as the requirements of supervi
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The use of hermetically sealed comp
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The configuration used in Railway S
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This may be accomplished by several
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A typical example of commonly used
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7.2.6.2The above sequence of messag
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7.3 SCADA EQUIPMENT 7.3.1 General T
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7.3.10 SCADA Software The operating
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systems are different, the basic fe
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140
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To combat interference, co-ordinate
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e = Er / R were introduced in the v
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It is seen that even if the lines a
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Fig. 8.3 Fig. 8.3 contains a family
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Typical Rail Current Distribution F
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8.8 SUPPRESSION OF INTERFERENCE AT
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Magnetizing current is required to
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REGULATION FOR ELECTRICAL CROSSING
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Kc is cable screening factor and it
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